How can I access the source code relevant to the William Carter mysteries in the previous Don't Starve updates?

I'm here with interest in the William Carter puzzles put out by Klei. What I'm really after is the cool ASCII art that Klei hides in the don't starve hidden webpage source files. I found all of this out on the Don't Starve wiki. Can anyone give a straightforward walkthrough of how to access the source codes of these websites and\or provide the ASCII art that they contain?

Thanks in advance, this might be a somewhat difficult question.